<template>
	<view>
		<view class="goods-list">
			<view v-for="(goods,i) in goodsList" :key="i" @click="gotoDetail(goods)">
				<my-goods :goods="goods"></my-goods>
			</view>
		</view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				//请求参数对象
				queryObj:{
					query:'',//查询关键词
					cid:'',//分类ID
					pagenum:1,//页数索引
					pagesize:10//每页长度
				},
				
				//商品列表的数据
				goodsList:[],
				//总数量，用来实现分页
				total:0,
				//默认的图片
				// defaultPic:'https:img3.doubanio.com/f/movie/8dd0c794499fe925ae2ae89ee30cd22570457b4/pics/movie/celebrity-default-medium.png'
				
				//节流阀(防止发起额外的数据请求)
				isloading:false
			};
		},
		onLoad(options) {
			this.queryObj.query=options.query || ''
			this.queryObj.cid=options.cid || ''
			
			this.getGoodsList()
		},
		methods:{
			//获取商品列表的数据
			async  getGoodsList(cb){
				this.isloading=true //打开节流阀
				const {data:res}=await uni.$http.get('/api/public/v1/goods/search',this.queryObj)
				//关闭节流阀
				this.isloading=false		
				//只要数据请求完毕就调用停止下拉刷新函数
				cb && cb()
				
				if(res.meta.status !== 200) return uni.$showMsg()
				//新旧数据拼接
				this.goodsList=[...this.goodsList,...res.message.goods]
				this.total=res.message.total
			},
			gotoDetail(goods) {
				uni.navigateTo({
					url:'/subpkg/goods_detail/goods_detail?goods_id='+goods.goods_id
				})
			}
		},
		onReachBottom() {
			if(this.queryObj.pagenum * this.queryObj.pagesize >= this.total) return uni.$showMsg('数据加载完毕!')
			
			if(this.isloading) return
			
			//让页码值自增+1
			this.queryObj.pagenum++
			//重新获取列表数据
			this.getGoodsList()
		},
		//下拉刷新
		onPullDownRefresh(){
			//1.重置关键数据
			this.queryObj.pagenum=1
			this.total=0
			this.isloading=false
			this.goodsList=[]
			//2.重新发起数据请求
			this.getGoodsList(()=>uni.stopPullDownRefresh())
		}
	}
</script>

<style lang="scss">

</style>
